Means for pressing and trimming tape reenforced seams of sheet rubber articles



June 30, 1931, A. E. COLLINS 1,812,286

MEANS FOR PRESSING AND TRIMMING TAPE REENFORCED Y SEAMS 0F SHEET RUBBER ARTICLES AriizurE. Collin/',

'BJ 7%@ @4MM June 30, 1931. A. E. CQ MEANS FOR PRESSING AND TR Ms lNs 1,812,286 ING TAPE REENFORCED OF SHEET R ER ARTICLES Fil SEA ed Dec. 2 Sheets-Sheet 2' y IL/'en'onf Ari'ku'lz Colli/'216i @y at MM @www Y Anya.

' o sust with the 50 'vation,and

Patented' June :saluerY ARTHUR n. oonLrNsor To THE MILLER RUBBER COMPANY; I Nc `frIoNor DELAWARE: t

MEANsFonfrnnssInG AND Tamm:

GUYAHOGA'FALLS,

onIo, AssIGNoR, BY ,MESNE AssieNMEN'rs,

., GEWILMINGTON, DELAWARE,y A ooRPonAj-` NG1 TAPE nnENroRoEn sEAivis or" SHEET y131113131112; AARTICLES; v l c f Application mea Depembergo, 1929',seria-m4155113;

Y said invention relates to i improved Y means for trimming'off -the reinforcing tapes orv ribbons of bath Y caps and similar articles and increasing the weld between the end ypor- 5 tions of the ribbon and-theunderlying seam v portions.

" In' an app by be in the United even date herewith, I have 'disclosed means nemen ser-iai 415,545* sied 1() for applyingv a continuous ,tape olf-ribbon successively to .the 'cut 'together Yseams of bath caps and for automatically severing the ribbon or tape between the successivecaps;v In this operation, yit is. impracticable to 15 sever the Atape orribbon flush with the edges of the cap, andi-the caps therefore issue from the machine with a portion oftlietape issuing from each`.end vof the seam ofthe 'capin' thev i shape of a tab which must` betrimmedjoif.

edge of the cap to give a proper finish- The present invention aims top'rovide apf paratusk by which such 'trimming maybe acf c urately veffected i'n an A"expeditious and eco-k nomical manner. 1 l Y The invention aims also to rprovide, means for increasingthe,weld` or adhesive union' between the endvportionso'f thereinforcing tape tions ofthe cap. f c l With these and other obJects 1 n view, which t will hereinaftervappear, the invention 1ncludesthe novel'features of construction and Y arrangement and combination' ofparts herelinafter described, the said invention being delined by thefclailmsappended'hereto. fi fi Whatlatpresent. consider the .preferred embodiment of vthe inventionisillustrated in ng drawings inwh'vich:

.the accompany;

Figurev 1 is asideiviewofthecmaehine 0r c apparatus. l y ,c

J Fig. 2 is a'front vlew.

Fig. 3 isan enlarged detail lshowing lthe hammer in front elevation and lower Vportion of head 7 in, section Vand the anvil cooperating position.y l I Fig. 4 is a section on line P-Lof Fig. 3.

i' Fig;y 5 is a plan view of the hammer.l

Fig.l 6 showsthe -knl States Patent Oiice lof description.-

"or ribbon and the'underlying seamed por- 30 fe in side and end ele- Y s rgjzfz sapienti@ @fue am 'It "will be understood thatthis m of making up bathing caps and klike articles and that the-caps are conductedtothey opachine Y c `functions as a nstep in' the'colnpleteoperation erator of the machine rkhereindescribed from Y thereinfo'rcing machine of my saidapplicaton'by 9 Conveyofbelta the Operator reIIlOV'V 'i i ingfthe -cap from the-conveyo r, 'subjecting it to the action dof the",A machine 'hereinde scribed, and replacing ritv uponv thensam'e or another conveyor to be condfuctedfthereby`Y tothefvulcanizing,'apparatusffj y c My present apparatus `orinachine includes an anvil or platenandfa combinedribbon ing ih ead 1 mounted upon a tableframe 3 and position for convenience of the operatorby cutter and pressen iniemberfor hammer co,-

operating therewith lwhich-are v}` 'ref(-irablyl mounted in or. carriedbyf apparatus of lthe` v f -ordinary punch lpress typ e',ri ncluding aro`c'l r";

7() Y capable of being-set nany desired angular the arcuate slot and boltconnection2,which,j

being well known, requires Ano moreA l specificf c f On thesuppOrting plate 4 ofthe head1 is fixed thev anvilj5,soishaped and alined on 'the base'plate as to permit the operatorI vto easily place thereonthe cap or othera'rticle in position 'tobe operated onfloyv the'hammer 16 and cutter 1 5 as hereinafter more fully'deyscribed mounted onor carried by the lower end ofthe 'reciprocatinghead.; This is forced down witha]v action at Vthe' required time (after the cap has hammerv like y been properly positioned), by the operator depressing a treadl'eflever Swhichis connected by a rod 8a to a clutchj) which serves a to' connect drive .pulley 9a with the eccentric;y

y,shaft/1 1 pulley Qamay be drivenby beltjlO'V *fromfan "overhead shaft (not shown)V this being shown -a's'fmerely a .convenient lmeans of applying power.4v Eccentric' shaft l ,ciprocating movementto the head 7 inthe /inanne'r ,well understood by ,those familiar l impartsrectilinearfre- `1 -957 l with theaction of punch presses, andfbrealr means'lla of the known type, are .provided to check the movementv of the drive is disconnected. 'Y i shaftwhenY the A wire guard 12 is preferably provided about the hammer 6 and affixed to the press frame to guard the operator, and if desired, an electric lamp 13 may be provided to properly illumine the work at the point of action.

The hammer 6 before referred to is of rectangular shape and is provided with an upstanding integral shank 6a designed to be secured in a recess 7a in the head 7, the upper face portions of the hammer abutting against the lower face of the head and receiving the thrust.

rlhe lower portion of the hammer body 6 is cut away or rebated on each side to provide angular grooves to receive the :bars 14 which have beveled outer faces and countersunk apertures to receive the holding inachine screws 14a which are tapped in to the relatively narrow portion of the hammer formed by said angular grooves as shown in Fig. 3, which relatively narrow portion cooperates with the corresponding narrow portion of the anvil.

The knife 15 of tool steel is of approximately T shape as shown in Figure 6 and is slidably seated in a vertical slot or guideway 6b in the lhammer body, being inserted in the guideway from below and held therein by the angle bars 14 which are applied after the knife is inserted.

The knife is positioned transversely of the hammer body and near the rear face or end thereof so as to have its cutting edge alined with the edge of the cap when the latter Vis positioned upon the anvil as shown in Fig. 4, whereby it will pinch off the excess or projecting portion of the ribbon as the hammer descends.

Springs 16 are placed in suitable bores or recesses over the T head of the knife to normally press the same downwardly and cause its cutting edge to project below the knurled lower face 6c of the hammer which acts on the reenforced seam adjacent the edge of the cap, and these springs are retained in place by threaded plugs 16a tapped into the upper ends of the bores 16.

Proper clearance or space is provided in the guideway to permit the upward movement of the knife to cause its edge `to recede on contact with the anvil, the downward movement of the knife within the guideway being limited by the bars 14 above described.

The anvil 5 is of T shape as viewed in plan having its wider portion towards the rear providing an upstanding vertically disposed relatively narrow portion 5a? which isof substantially the width of the seam reinforcing band c of the cap or other article C, and providing also rear laterally projecting wings or shoulders 5y. Vhen the cap is placed in position with its reenforced seam overlying the upper face of said narrow porti on of the anvil, the portions of the cap on each side of the reenforced seam depend into aproxirnately the position indicated in Fig. 3 whereby the' rear 'edges of each side of said seam abutting against the inner faces of the projections or shoulders 5]/ serve to accurately position the cap edge relative to the knife or cutter so that only the projecting tab will be cut and that exactly at the edge of the cap as will be clearly apparent from Fig. 4, the cutter being alined with the inner faces of the shoulders.

The anvil is provided at base with ledge portions which enable it to be secured `to the plate 4 by machine screws 5a, and its upper face portion which cooperates with the hammer and cutter is preferably made in the shape of a renewable or replaceable wear plate of hardened or tool steel as indicated 'at 5?).

l have found it most advantageous to lprovide means for holding the tab or extension of the ribbon projected during the seam compressing and tab cutting operation and to this end I provide the anvil with communicating passageways 5c, 5cl, 5c bored therein, the first mentioned being connected with pipe 17 leading to any suitable source of air under pressure not shown) and the last mentioned discharging into the upper surface of the anvil beneath the cap seam and being inclined towards the rear. he resulting outwardly directed jet of air holds the tab eX- tended and prevents any wrinkling of the cap seam portion, and facilitates the accurate cut oif of the tab.

The amount of air discharged may be accurately regulated by the regulating screw and the air pressure may be further regulated by valve 18 mounted in the pipe line directly below the table plate 4.

ln practice, the operator picks the oncoming caps from the conveyor table, one at a time, and places them, with the seam and reinforcing ribbon opened out flat, upon the anvil.. with the edge of the cap up against the T extensions thereof and the ribbon end floated out straight, due to the air jet playing thereagainst.

New, by a. slight pressure on the footpedal 8, the hammer is dropped down to deliver its blow upon the seam and at the same instant, the knife 15 carried thereby, will perform its pinching oif action on the ribbon end. Thereafter, the operator removes the article and replaces it upon an upper deck of 'the conveyor to be carried on to the inspectors.

lt may be noted that there is a tendency of the pinched off ribbon end to still adhere to the cap edge, due to the tacky nature of the unvulcanized rubber, and this is a faultof advantage to the operator, as it usually carries the excess piece away with the cap to the vulcanizer, where in the curing operation, it will drop off easily and can be dispensed with thereafter without causing a gumming up at the punch press.

By providing a combination of trimmer A I claim is:

knife and hammer, I secure a neat accurately trimmed reinforcement and the weldebetween the end portion of the ribbon and cap is greatly strengthened by the compressingac@ tion of the hammer. y f Counter mechanism may be attachedfto the ram 7 to facilitate the counting of ther Y articles acted upon if desired'. f

'nvention what Having thus described my 1 l. Apparatus for thepu'rpose described comprisingan anvil having a relativelyA narrow seam supporting portion and lateral shoulders adjacent one end thereof, va presf' l ser member eooperatingwith said anvil, andA a cutter yieldably carried by said presser member and `alined with the inner faces of said shoulders. V

'2. Apparatus for lthe purposev described comprisingl an anvil having a relatively narrow seam supporting portion and .lateral shoulders adjacent one end thereof, a presser member'mounted for movement towards and t y rfrom said anvil, said pressermember hav'- ing atransv'erse slot and rebated sides, a

knife seated in said slot having lateral shoulders, retaining bars secured in the said rebated sides and underlying` the lateral shoulders of the knife, and spring means 3o carried by said presser member exerting V pressure on said knife.

Apparatus for trimming a two piece rubber'articleat the edge of one of thel pieces, f f

said apparatus comprising a stationary anvil member provided ywith stops for aligning' the edge of one of the pieces with the line of trim, means carried by the` anvil for pneumatically positioning they superfluous end f of the other piece across the'V line of trim,-and 4,0 a movable knife adapted to cooperate with the anvil to sever the superfluous end in aligni ment with the edge of the Viirstrnamed piece. 'i 4. Apparatus as defined by claim 3 includ? Ying article compact-ing means associated Withy ,v

f the knife for cooperation with the anvil;

In testimony whereof, I affix my signature;`

ARTHUR E.y COLLINS. 

